Dust spraying device



Aug. 16, 1938. w. H. ROSE DUST SPRAYING DEVICE Filed Sept. 9, 1937 INVENTOR.

ATTORNEY.

Fatented Aug. 16, i938 E FRfiYHNG Wiiiiom Id. ldose, derseydlity, d.

duplication Sentemher 9, rest, Serial No. id3,iitid My invention relates to powder-spraying de-- vices and refers particularly to devices of this chsrecter in which the finer particles of the powder are automatically separated from the 5, larger particles, the finer pairticles being emitted in the form of s spray, while the larger particles are retained in the powder container.

As powders are sprayed with the object of covcrime as large on area as is possible with a given 1o quantity of powder, it is evident that the amount so covered is dependent upon the fineness oi the sprayed powder.

in the employment of insecticidal powders, it is essential that a. maximum number oi insects 15 or a, maximum amount of foliage must he contscted in order to produce the maximum results. and hence the efficiency and economy of such powders are dependent upon the fineness of the powder employed.

so in the usually employed powdebsprcvs, or powder guns, the powder is placed in o. receptecle and forced outwardly in the form of d sprcy by means of an air current, the spray consisting of the entire powder mass of large and small perti- 25 clen- The larger particles not adversely to the proper eficiency oi the spray, so their notion upon the lighter particles materially reduces the distance to which the material may he sprsycd, reduces 30 the breadth of the spray, prevents a promidis- I have overcome the diilculty of separating the finer porticies from the larger particles by con 40 structlng-a device in which this separation is automatically accomplished during the spraying process and in which the finer perticles ere con-= tsined within the spray end the lnreer ones re tsined in the powder container.

45 The novelty, usefulness end adventures of my device will be evident upon s consideration oi my specification end its sccompsnvlnn drawing,

: in which similar ports are designated by numerals.

so Figure l is e broken vertical cross section of one form of the device of my invention.

Figure 2 is a front view of the upper portion of the device of Figure 1.

theme 3 is a section tel-sen on the line e-e of 55 Figure 11.;

Fla 4 is a fragmentary vertical section of o. modified form of the device of my invention.

Figure 5 is s fragmentary front view of the device of Figure 4. j

The particular form oi the device of my in- 5 ventlon illustrated in Figures 1 to 3 comprises a casing it having a. closed end ll through which there is a central opening 02 and s closed end I3 having a curved formation with a centrally positioned concave portion id through which is an 1 opening IS. A longitudinally movable plunger consists of the metal disir iii, the leather, or

'rubber, washer ii and the metal member it, the

latter being adopted to maintain the disk 16 in contact with the inner i'sce of easing iii andto' maintain it in proper form during the operating process. A plungerrod it! is attached to the plunger member and extends outwardly through the opening E2 of the end it and hes a handle 20 attached thereto. Fixedly attached to the inner 2 face oi the casing Id is a. motel annular member 26 having openings 22.22therein, which are covered by the flexible dust impervious member 2a ettachedto the member fit by means of the rivet 2d.

The device of my invention is not limited to the particular construction of powder dun above, described, this form being illustrated simply as a, means oi'showing and describing the dust forming and. spraying elements of my device. r 39 A container cover it is fixedly attached to the forward and underside of the powder gun and has e threaded downwardly extended curtain flange 26 adopted to be removnbly attached to the threaded neck 21 of the powder container as.

The cover 2% has an opening it through which is passed the tube 30, the'upper end of which is in diluent with the opening it or the end it and theiower end of which terminotes in the 40 upper portion of the powder cont-diner 2d and shove the top of the powder 8i within the con.

tuiner indicated by the line 532.

n cover til hos soother opening 88 end the casing id hos on opening lid tllrough which is passed the tube 3%. the upper end of which terminotes in the lower portion oi .he chamber 36 icon by the end it end the member it, the lower end oi the tube til tenstine e. short distence from the bottom of the powder container 2d the operation oi the device is as follows: Whenthe plunger is forced inwardly within the casing, the valve 23 covers the openings $22.22 and the air within the chamber kid is forced through the opening it ot-the end it endthrounh the tube s5 the container 28.

a The air forced through the tube}! agitates the powder 3i carrying the light ilne air-blown particles into the space 37 above the powder mass,

leaving the heavier particles within the powder mass.

The air passing through the opening I! of theend i3 and over the end of the tube", 'draws these light flne air-blown particles upwardly through the tube 30 and thence outwardly from the device in the form of a spray.

It will thus be seen that the emitted dust contains only the fine air -blown particles and is, therefore, finer, more efllcient and more economical than would be the case if the entire mass of powder containing both fine and large particles was blown in the form of a spray. Y The modified form of my device illustrated in Figures 4 and 5 is similar to the device previously described, except that the upper end 38 of the tube 3!! is closed and the tube 30 has an opening 39 through it in alignment with the opening E5 of the end ii. The lower end 40 of the tube 35 is bent horizontally. The operation of this device is similar to that described, except that the airblown powder is forced outwardly through the opening 39 of the tube 3..

It is evident, therefore, that during the operation of my device the fine, light particles ,of the powder are automatically separated from the larger heavier particles, the full particles being emitted as a spray while the larger particles remain in the powder receptacle.

I do not limit myself to the particular size, shape, number, arrangement or material of parts as shown and described, as these are given simply for clearly describing the device of my invention.

What I claim is:

1. A dust spraying device comprising a casing having a small opening in one end, a powder container, air means between said casing and. said container adapted to violently agitate a powder mass within said container, and air means adapted to remove powder from above said powder mass and emit it from the device in the form of a spray, said air means having an opening in alignment with said end opening at said casing.

2.4! dust spraying device comprising a casing having a small opening in one.end, a plunger longitudinally movable within said casing, a powder container, and air means betweensaid casing and said container whereby a movement of said plunger will violently agitate a powder mass within said container .and will remove powder from above said powder mass and emit it from the device in the form of a spray, said air means having an opening in alignment with said end opening of said casing.

3. A dust spraying device comprising a casing having a small opening therein, a-powder container, air means within said casing adapted to force air into said powder mass causing a violent agitation thereof, and means within said casing adapted to remove powder from above said powder mass during said agitation and to emit it from the device in the form of a spray, said air means having an opening in alignment with said end opening of said casing.

4. A dust spraying device comprising a. casing having a small opening in one end; a longitudinally movable plunger within said casing; a powder container; a cover for said container having two openings therein; a tube passing through one of said openings and terminating in the upper portion of said container, said tube having an open-- ing in alignment with said casing opening; a second tube passing through the other container cover opening and connecting the space within the casing between its end opening and said plunger with the lower part of said container and means for moving said plunger longitudinally forcing air from within said casing through'said end opening and said second tube. Y

5. Adust spraying device comprising a casing having a small opening in one end; a powder concasing with the lower. portion of said container and means for forcing air from within said casing through said end opening oi said casing and 'WILLIAHEROSE.

' said second tube. 

